13240557 has 32 divisors (see below), whose sum is σ = 21648000. Its totient is φ = 7931520.

The previous prime is 13240553. The next prime is 13240573. The reversal of 13240557 is 75504231.

It is a happy number.

It is not a de Polignac number, because 13240557 - 2² = 13240553 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 13240557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13240553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32169 + ... + 32577.

It is an arithmetic number, because the mean of its divisors is an integer number (676500).

Almost surely, 2^13240557 is an apocalyptic number.

It is an amenable number.

13240557 is a deficient number, since it is larger than the sum of its proper divisors (8407443).

13240557 is a wasteful number, since it uses less digits than its factorization.

13240557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538 (or 532 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 13240557 is about 3638.7576176492. The cubic root of 13240557 is about 236.5749471564.

Adding to 13240557 its reverse (75504231), we get a palindrome (88744788).

The spelling of 13240557 in words is "thirteen million, two hundred forty thousand, five hundred fifty-seven".